Collaborative Research: Algal Food Quality: Its Biochemi- cal Charcterization and Role in Zooplankton Feeding and Fecundity Responses

合作研究：藻类食品质量：其生化特征及其在浮游动物摄食和繁殖力反应中的作用

• 批准号: 9220884
• 负责人: Susan Kilham
• 金额: $ 18.61万
• 依托单位: Drexel University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-04-15 至 1996-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9220884&HistoricalAwards=false
• 关键词: Collaborative; Research; Algal; Food; Quality

The research investigates the specific aspects of algal food quality that affect feeding and fecundity of herbivores. While the physiological condition of the algae is a critical factor influencing ingestion rates and reproduction, biochemical components of the algae are frequently not characterized or controlled. To test the hypothesis that the major cellular constituents of algae vary with different limiting resources (N, P, Si, light), the PIs will assess patterns of biochemical components over a range of growth rates in three species of algae grown in continuous cultures, under various resource limitations. To test whether algal biochemical composition affects the feeding and reproductive rates of herbivores, the PIs will measure fecundity of Daphnia pulicaria with the various diets. To assess if seasonal variation in lipid production reflects changes in the quality of phytoplankton, the PIs will monitor seasonal fluctuations of lipids in algae and zooplankton in three lakes across a trophic gradient. Food quality in aquatic ecosystems is highly dynamic. The aim is to identify the general patterns of accommodation of algae and herbivores to the variable resource base.

该研究调查了影响食草动物的饲料和繁殖力的藻类食品质量的具体方面。 尽管藻类的生理状况是影响摄入率和繁殖的关键因素，但藻类的生化成分经常不被表征或控制。 为了检验以下假设：藻类的主要细胞成分随不同的限制资源（N，P，Si，Light）而变化，PIS将在各种资源限制下，在连续培养中生长的三种藻类中生长的三种藻类中的生长速率上评估生化成分的模式。 为了测试藻类生化成分是否影响食草动物的饲料和生殖速率，PIS将用各种饮食来测量plicaria的繁殖力。 为了评估脂质产生的季节性变化是否反映了浮游植物质量的变化，PIS将监测藻类和浮游动物梯度中三个湖泊中脂质脂质的季节性波动。 水生生态系统中的食物质量是高度动态的。 目的是确定藻类和食草动物的一般模式与可变资源基础。